In terms of architecture and features, the X1800 GTO is identical to the X1800 XL with the exception of the pipeline count: rather than 16 pipelines, it has 12. When asked whether there was any difference aside from pipelines that distinguish the XL from the GTO, ATI said “it’s R520 [X1800 XL] with 75% of the pipes.” As I alluded to earlier, while ATI is officially announcing the X1800 GTO today, they are not going to be launching (in the sense that we’re becoming used to, anyways) today. In fact, ATI won’t be selling any ATI-brand X1800 GTOs at all; they will only be made by Add-in-Board partners (AIBs). The official word is that you should be able to purchase a GTO made by one of the board partners by March 31st, and I was told that is a conservative estimate – we may start seeing them available in the 2nd or 3rd week of this month